Box-blank machine



J. B. SCHMIDT.

BOX BLANK MACHINE.

APPLLcATxoN FILED JAN.|7,1921.1

Patented Aug. 22, 1922.,

3 SHEETS-SHEET l.

l. B. SCHMIDT.

BOX BLANK MACHINE.

APPLrcATaoN FILED JAN.17, |921.

3 SHEETS-SHEET 2.

Q Q e Q 24 42 l. B. SCHMIDT.

BOX BLANK MACHINE.

AFPLlcAoN FILED JAN. 11, 1921.

l Ag. Patented Aug. 22 22.

3 SHEETS -SHEE www @zu Jacob B. 5mm/d.

hand after the blanks have scored i lllitlil .il It at@ JACOB B.SGHMIZDT, OF VILWA'KEE, WISCONSIN.

BOX-BLANK MACHINE.

treason Specification of Letters Eatent.

Patented Aug. 22, i922.

Application filed January 1'?, 1921. Serial No. 437,835.

To all whom` t m 01?/ cmwcwi- Be it known that l, Hoon il. fieriiinrr, acitizen of the vUnited States, and resident of ll/iilwaukee, in thecounty of Milwaukee and State of lNisconsin, have 'invented new anduseful lmproven'ients in .Pori-Blank li achines, of which tie followingis descrip tion, reference being had to the accompanj ing drawings,which. are a part of this specilication.

This invention relates 'to certain new and useful improvements in bonblank forming machines and refers more particularly to that part of an'iachine of this character in. which the securing folds of the blanksare formed.

l-leretofore, the securing folds or tab portions of box blanks have beenformed by form fold or crease lines, which is a tedious operation andnecessitates the employment of eXtra help.

Hence, with this and other objections in mind,vmy invention has for oneof its objects to provide means whereby the box blanks have the securingfolds formed ther on by mechanical means whereby, yith the aid of but asingle operator, who feeds the blanks to the machine, the output of aplan?l may be greatly increased.

nother object of this invention is to pro` vide a machine formechanically forming the securing folds on box blanks in which theblanks may or may not be previously scored along the bend line of saidsecuring folds and one which is capable of ready ad justment toaccommodate blanks of different shapes and sizes.

lilith the above and other objects in view which will appear as thedescription pro'- ceeds, my invention resides in the novel construction,combination and arrangement of parts substantially as hereinafterdescribed and more particularly delined by the appended claims, it beingunderstood that such changes inthe precise embodin'ient of thehereindisclosed invention may be made as come within the sgope of theclaims.

lnthe accompanying drawings, l nave illustrated one complete example oftheV physical embodiment of my invention constructed according to thebest mode I have so far devised for the ypractical application of theprinciples thereof, and in which:

Figure l is a side view of a machine emloodymg my invention;

Figure :2 is a fragmentary view part in section and part in elevationtaken on the plane of line 2 2 of VFigure Figure 8 is a top plan view ofmy improved machine;

Figure l is a perspective view of one of the fold forming platesen'iployed in con.- nection with the machine;

Figure 5 is a view taken transversely through Figure l on the line 5 5;and

Figure 6 is a sectional view taken transversely through Figure l on theline 6-45.

Referring now more particularly to the accompanying drawings in whichlike numerals designate like parts 'throughout the several views: l I

The numeral 5 designates a supporting` standard having secured thereontwo pposed elongated bearing carrying members 6 and 7 having, mcdiallysecuredthereto. platform 8 along which the blanks to be formed withsecuring folds are fed. The platform 8 has a number of spaced open--ings 9 extending thereacross, and journaled in the bearing members 56and 7 in register with. the openings 9 with their uppermost facessubstantially in alinement withthe top face of the platform 8 are feedrollers l0, said feed rollers having the ends of their 'supportingshafts ll 'journaled in the bear-u ings 6 and Fixed. to each shaft ll,medially between its roll l0 and the bearing rmeiuber i' is a sprocketwheel l2. The

sprocket wheels lf2 are connected together by a continuous chain lf3engaged therewith, The sprocket chain is held in engagement with thecenter sprocket wheels l2 by an idler wheel lli .secured to the bearingmember 6 as best shown in Figure 2, and the upper run of the chain isheld taut by an idler wheel l5 secured tothe bearing member T on a planeabove the rolls l0. l@ne of the shafts ll has its end extended rbeyondthe bearing member 6 toreceive a pulley 16 which is drivingly connectedwith an electrical motor l? mounted on the frame 5 by a belt connection18. v

Fixed to the sh ft l1, carrying the pulley 16, is a gear wheel 19 whichis adapted to mesh with a gear wheel 2O fixed to the shaft 2l on a feedroll 22. The feed roll 22 is one of a series arranged above the lowerrolls 10 and adapted to be yieldingly urged into engagement with thelower 'rolls 1G by adjustable spring means 23. All of the shafts 2l havetheir ends adjacent the bearing member 6 eXtended therebeyond to receivedrive sprockets 28 which are connected for simultaneous rotation vby asprocket chain 25, the lower run of said chain. passingover an idlerwheel 26 and thev medial portion of the upper run being retained inengagement with the two center sprocket wheels by an idler wheel 27.With this construction, the rotation of the first roller 22, due to itsgear connection with. the adjacent lower roll l0, also imparts a likerotation tothe remainingv upper rollers. Y

The two upper end rolls 22 are in the form of a continuous cylindersimilar to the lower rolls, `and the interniediate rolls are formed byspaced wheels or pulleys carried by the intermediate shafts 2l. Theintermediate roll adjacent the-first upper rolly consists of two wheelsor pulley members 29 and the other intermediate roll consists of acentral wheel or pulley 30, 'similar to the other wheels 29, and two endwheels or pulleys 3l having theirinner peripheral edges beveled, as at32, for the purpose fto be hereinafter described.v Connecting` thebearing members 6 and 7, between the tirs" two rolls and the second andthird rolls are two shafts 33 and 34, respectively, and adjustablysecured to said shafts near each end are depending` bracket members 35having their lower ends secured to plate meinbers 36. Said plate4members 36 engage the platform 8 near the sides thereof and are capableof ladjustment to vary the dista-nee therebetween by loosening thebinding means 37 which secure the bracket members to the rods 33 and 34.

Centrally depended from the shaft is a bracket member 38 having; tworollers 39 carried thereby for engagement with the blanks as they arefed through the machine, and-secured to the rod 34, in spaced relation,are two similar bracket members 4:0 having rollers il carried therebyfor engagement with the blanks to retain the same flat on the platform.

Adjiistably mounted in each bearing' memi ber6 and 7, intermediate theIlast Ltwo rolls,

are two jack-screws 42 having a transverse plate 43 secured to theirlower ends and adapted to be adjustably suspended above the platform 8.The inner edge of said plate 43 is :cur-ved or rounded as at 44 to:guide the blank therebeneath as they are fed through the machine by thecoactine;

' Ifeed rolls.

`Each plate .36 v'has a reduced portion 415 of sa. width substantiallyequal to ythe width `of the securing fold 46 to form the blanks ffedthrough the machine and said reduced iporltionexltends `to a pointl anditsdepth idecreases until iat pointe-7 it issubstantiallv nill. Theadjzfnient edge off the plate then c1/.invesoiver, ns 1at 48, tovpointrl')` when #the same forms an outer edge having its top point 50extended laterally beyond its lower point 51. VVit'h this construction,a plurality of blanks are placed upon the receivinl;- table 52 which hastwo adjustable guides y extended thereover and said blanks may, ifdesired, be provided with scoringV 54 along the line where the same areto be folded.

An operator then slides the blanks from the pile upon table 52 beneaththe lirst'set of feed rollers, one at time and the first feed rollers jnogress the blank through lthe machine. The side edges of the blank passoier the reduced portion 45 ,of each plate 36 and before the iirst setof feed rtillers relinquish their grip upon the blank, the sefg'ond setcontinue the ileeding ofthe blank. T he upper roll of the second setconsists .of the two wheels 29 which are positioned adjacent the plate3l' in alinement with the tiirninj.;` portion 4S thereof= whereby v.theblanks a re held firm while said turning -portions 48 bend or fold overthe portions of the blank outwardly of the scoring 54.

The eXtreme inner ends lof the plates 36 complete the folding' over ofthe portions 416 and the blank is then progressed l and before thesecond set of feed rollers relinquishv their grip upon the blank, thenext set ene the same. This third set of rolls hask the upper one formedwith the wheels 30 land 31,' and the beveled portions ,32 of 'the wheels31 engage the folded parts 46 to assist in turning the same .down toinsure .their passino; under the transverse `mem-'ber 43. The transversemember 43 creases the folds 46 and .they then pass under the last set ofrolls and are `discharged from ,thev machine in condition to beassembled and have the securing` folds 46 Isecured in place to form theassemble boX.

What I claim as my invention is:

l. In a machine of the class described,`

fold forming; means comprising a plate, means for feeding` a :blank pastsaid plate withits adjacent edge portion engagingthe same, a shoulderportion formed `on'said platek to fold the adjacent portion lof theblank as it is fed past the plate, and means comjjirising asubstantially rigid .transverse bar ycoactine` with said plate |tocrease the blank at the fold.

2. In a machine ofthe class described the prising a platform; means. forfeeding blanks along said platform; a plate positioned adjacent eachside ot said plattorm and provided with twisted surface adapted to beengaged by the edge portions of said blanks whereby said edge portionsmay be partially Vfolded; a substantially rigid bar adapted to engagesaid parti ally 'folded edge portions and crease the saine; and means:tor ieedingij said blank edge portions beneath said bar.

el. A machine for folding bei; bl anls comprising a platform; means forfeeding` blanks along' said platform; plate positioned adjacent eachside or said platform and provided with a twisted surface adapted to beenl jed by Jhe edge portions of said blanks whereby said edge portionsmay be partially folded; a substantially rigid bar adapted to engagesaid partially folded edge portions and crease same; and meanscomprising` a pair ot rollers each having a beveled tace for iteedinp;said blank and oogje portions beneath said bar.

A machine for forming folds on blanks, comprising a plattform, means for'feeding blanks along the platform, a plate positioned adjacent eachside of the platform and engaging the Aadiacerrt edges of the blanks asthey are ted therepast, fold tormmeans on the plate, and roller meansenthe blanks adjacent crease of the "fo to retain that part ol' theblanks adjacent the folds in eng` gement with the platform, asubstantially rigid bar located transversely ot said platform adapted toengage said edge portions and crease the saine, and rotating means torfeedingi said blank and edge portions beneath said bar.

(l. machine :tor forming folds on blanks, comprising a platform, means'lor feeding blanks along;l the platform, a plate positioned adjacenteach side ot the platform and the adjacent edges of the .is as they arefed therepast, told torining means on the plate, roller means engaging`the blanks adjacent the crease of the told to retain that part ot theblanks adjacent the folds in engagement with the platform, and meanscomprising a substantially rigid transverse bar for pressing the foldsas the blanks pass beyond the plates.

ln testimony whereof, l afir my signature.

JACOB B. SCHMIDT,

